10. On the basis of the general solubility rules given in Table 8.1, predict the identity of the precipi-
tate that forms when aqueous solutions of the
following substances are mixed. If no precipitate
is likely, indicate which rules apply.
a.
Nat
+
CI
SO,
Ca2+
Cl-
Nat
b.
NH,
+
Ag
NOZ
C.
K+
K+
PO3-
K+
+
Pb²+
NO3
NO3
d. sodium hydroxide, NaOH, and iron(III)
chloride, FeCl3
e. potassium sulfate, K2SO4, and sodium
nitrate, NaNO3
f. sodium carbonate, Na2CO3, and barium
nitrate, Ba(NO3)2

it is stable as it is in group 0 which have full outer shells of electrons

(newtons first law)

conservation of momentum law states :

momentum before collision = momentum after collision

momentum p (kg-m/s)= mass * velocity

say moving car=1 000 kg, velocity = 10 m/s then p = 1 000*10= 10 000 kg-m/s

say still car = 2 000 kg, velocity = 0 m/s then p = 2 000* 0 = 0 kg-m/s

total momentum prior to collision = 10 000 + 0 = 10 000 kg-m/s

momentum after collision = 10 000 kg-m/s

mass now = 1 000 kg+2 000 kg = 3 000 kg

10 000 = 3 000 kg* velocity m/s

10 000/3 000 = velocity

3.33 m/s = velocity after collision

an impulse is a force applied over time , momentum is exclusive of external forces and a perfect collision is implied